Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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A P-type Semiconductor is - Physics

MCQ

A p-type semiconductor is

Options

  • positively charged

  • negatively charged

  • uncharged

  • uncharged at O K but charged at higher temperatures.

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Solution

uncharged

A p-type semiconductor is formed by doping a pure semiconductor with a p-type material. As impurity atoms take the position of the germanium atom in a germanium crystal, three electrons of a p-type material form covalent bonds by sharing electrons with three neighbouring germanium atoms. However, the fourth covalent bond is left incomplete, with a want of one electron. This creates a hole. As the atom as a whole is neutral, the p-type material is also neutral.

Concept: Energy Bands in Conductors, Semiconductors and Insulators
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APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 23 Semiconductors and Semiconductor Devices
MCQ | Q 5 | Page 417
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